Quickly removes damaged screws and broken bolts as small as a No. 4 screw to as large as a 3/8" bolt. Two-step drill bit and extractor in one tool. Drills up to grade 8 and 10.0 class fasteners; extracts bolt sizes No. 10 - 3/8". Self-centering tip. No grinding, center punching required/ Compatible with quick-connect chuck system or can be directly chucked into drill.